About us
The mission of the Watershed Protection Division is to protect the creeks and rivers of the Monterey Bay and San Francisco Bay watersheds by fostering best practices in County operations, promoting increased public awareness of stormwater pollution prevention, and supporting innovative approaches to meet state and federal stormwater regulations.
Services
Meet our team
Background
The WPD was established to provide protection of our waterways through proper construction practices, public outreach, and permit implementation, coordination and reporting. WPD staff is responsible for ensuring the County’s compliance with federal and state water quality requirements by promoting stormwater pollution prevention practices, erosion and sediment control, and landscape features that filter pollutants from stormwater runoff. We achieve this by ensuring that all surface water draining into our County’s major waterways meets the Water Quality Standards defined by the federal Clean Water Act.
We use a collaborative approach, working in conjunction with 76 co-permittees in the San Francisco Bay watershed, with SCVURPPP and BASMAA, and with the cities of Morgan Hill and Gilroy in the Pajaro River and Monterey Bay watershed. Additionally, we work with local businesses, homeowners, and environmental stewardship organizations to minimize pollutants in stormwater runoff.
We implement two permits under the National Pollutant Discharge Elimination System (NPDES) within unincorporated Santa Clara County.
NPDES Stormwater Permits
Santa Clara County, as well as all municipalities, must maintain a NPDES permit to prevent the discharge of pollutants into Municipal Separate Storm Sewer Systems (MS4s). We have two different NPDES Permits:
- Phase I NPDES Permit: Designed for populations of 100,000+.
- Phase II NPDES Permit: Municipalities and regions of under 100,000.
Both permit types include requirements for the following:
- Public Education and Outreach
- Illicit Discharge Detection and Elimination
- Construction and Post-Construction Requirements
- Good Housekeeping Practices for Municipal Operations
In California, Regional Water Quality Control Boards (RWQCB) are authorized to issue NPDES Permits, which are determined based on the major bodies of water within their domain. The San Francisco RWQCB (Region 2) monitors waters discharging to San Francisco Bay, and The Central Coast RWQCB (Region 3) monitors waters discharging to the Monterey Bay and Central Coast. Because of Santa Clara County’s unique geology and topography, water in the South County (south of Cochrane Road at Highway 101) drains to the Pajaro River and Monterey Bay, and water in the North County drains to San Francisco Bay. As a result, our county maintains two NPDES permits under both RWQCBs.